Display screen or portion thereof with transitional graphical user interface



FIG. 1 is a front view of a first image of a first sequence of a display screen or portion thereof with transitional graphical user interface according to the claimed design;

FIG. 2 is a front view of a second image of the first sequence according to the claimed design;

FIG. 3 is a front view of a third image of the first sequence according to the claimed design;

FIG. 4 is a front view of a fourth image of the first sequence according to the claimed design;

FIG. 5 is a front view of a first image of a second sequence according to the claimed design;

FIG. 6 is a front view of a second image of the second sequence according to the claimed design;

FIG. 7 is a front view of a third image of the second sequence according to the claimed design;

FIG. 8 is a front view of a fourth image of the second sequence according to the claimed design;

FIG. 9 is a front view of a first image of a third sequence according to the claimed design;

FIG. 10 is a front view of a second image of the third sequence according to the claimed design;

FIG. 11 is a front view of a third image of the third sequence according to the claimed design;

FIG. 12 is a front view of a fourth image of the third sequence according to the claimed design;

FIG. 13 is a front view of a first image of a fourth sequence according to the claimed design;

FIG. 14 is a front view of a second image of the fourth sequence according to the claimed design;

FIG. 15 is a front view of a third image of the fourth sequence according to the claimed design; and,

FIG. 16 is a front view of a fourth image of the fourth sequence according to the claimed design.

The longer-length dashed broken lines show an electronic device and form no part of the claimed design. The shorter-length dashed broken lines show the perimeter of a display screen and various elements within the graphical user interface, and form no part of the claimed design. The dot-dash broken line shows a portion of the graphical user interface, and forms no part of the claimed design.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-4 in a first embodiment, FIGS. 5-8 in a second embodiment, FIGS. 9-12 in a third embodiment, and FIGS. 13-16 in a fourth embodiment. The process or period in which one image transitions to another forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with transitional graphical user interface, as shown and described. 